Using a loop to create multiple variables

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Question :

Using a loop to create multiple variables

Let’s say I need to make 5 variables.
Since this may need to be adjusted in the future, I’m using a loop.

i = 0
for j in range(5):
    i += 1
    w[i] = function(i)

#results in:
    w1 = function(1)
    w2 = function(2)

I know the code above is incorrect.
Is it possible to use a loop to create different variables?

Asked By: i..


Answer #1:

To create multiple variables you can use something like below, you use a for loop and store a pair of key-value, where key is the different variable names

    d={} #empty dictionary
    for x in range(1,10): #for looping 

The output looks like

{'string1': 'Variable1', 'string2': 'Variable1','string3': 'Variable1', 'string4': 'Variable1', 'string5':'Variable1', 'string6': 'Variable1', 'string7': 'Variable1','string8': 'Variable1', 'string9': 'Variable1'}
Answered By: Chetan_Vasudevan

Answer #2:

You can create actual variables, but don’t. Use a list

W = []
for j in range(5):
Answered By: blue_note

Answer #3:

You’d better just use a list. It’s more readable and safer.
However, you can create variables in the global namespace using globals() dictionary:

i = 0
for j in range(5):
    i += 1
    globals()["w" + str(i)] = function(i)

Use it like this:

print (w1)

However, that’s probably not a good idea. You can accidentally override something in the namespace, which will cause hard to debug bugs. Really, try not to do that.

If you want to call them by name and not by index (as in a list), use your own dictionary:

my_variables = {}
i = 0
for j in range(5):
    i += 1
    my_variables["w" + str(i)] = function(i)

Then use like this:

print (my_variables["w1"])
Answered By: Neo

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